Add assertion that terminate clio (#994)

Fixes #893.

Also added termination handler to print backtrace on crash, so fixes #929.

unittests/util/AssertTests.cpp

@@ -0,0 +1,32 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2023, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <util/Assert.h>
+
+#include <gtest/gtest.h>
+
+TEST(AssertTests, assertTrue)
+{
+    EXPECT_NO_THROW(ASSERT(true, "Should not fail"));
+}
+
+TEST(AssertTests, assertFalse)
+{
+    EXPECT_DEATH({ ASSERT(false, "failure"); }, "failure");
+}

unittests/util/MockPrometheus.h

@@ -78,8 +78,7 @@ struct MockPrometheusImpl : PrometheusInterface {
         }
         auto* basePtr = it->second.get();
         auto* metricPtr = dynamic_cast<MetricType*>(basePtr);
-        if (metricPtr == nullptr)
-            throw std::runtime_error("Wrong metric type");
+        ASSERT(metricPtr != nullptr, "Wrong metric type");
         return *metricPtr;
     }
 
@@ -101,8 +100,7 @@ struct MockPrometheusImpl : PrometheusInterface {
         }
         auto* ptr = metrics.emplace(key, std::move(metric)).first->second.get();
         auto metricPtr = dynamic_cast<MetricType*>(ptr);
-        if (metricPtr == nullptr)
-            throw std::runtime_error("Wrong metric type");
+        ASSERT(metricPtr != nullptr, "Wrong metric type");
         return *metricPtr;
     }
 
@@ -137,8 +135,7 @@ struct WithMockPrometheus : virtual ::testing::Test {
     mockPrometheus()
     {
         auto* ptr = dynamic_cast<MockPrometheusImpl*>(&PrometheusService::instance());
-        if (ptr == nullptr)
-            throw std::runtime_error("Wrong prometheus type");
+        ASSERT(ptr != nullptr, "Wrong prometheus type");
         return *ptr;
     }
 
@@ -147,8 +144,7 @@ struct WithMockPrometheus : virtual ::testing::Test {
     makeMock(std::string name, std::string labelsString)
     {
         auto* mockPrometheusPtr = dynamic_cast<MockPrometheusImpl*>(&PrometheusService::instance());
-        if (mockPrometheusPtr == nullptr)
-            throw std::runtime_error("Wrong prometheus type");
+        ASSERT(mockPrometheusPtr != nullptr, "Wrong prometheus type");
 
         std::string const key = name + labelsString;
         mockPrometheusPtr->makeMetric<MetricType>(std::move(name), std::move(labelsString));
@@ -159,7 +155,7 @@ struct WithMockPrometheus : virtual ::testing::Test {
         } else if constexpr (std::is_same_v<typename MetricType::ValueType, double>) {
             return mockPrometheusPtr->counterDoubleImpls[key];
         }
-        throw std::runtime_error("Wrong metric type");
+        ASSERT(false, "Wrong metric type");
     }
 };